A blonde walks up to a helicopter pilot at an airshow. He notices her standing there awkwardly.
"Can I help you, miss?"
"I was wondering...if you could teach me how to fly that thing."
Now, this man is retired, so he has a lot of free time.
"Sure, why not." So the following Saturday, he starts giving her personal lessons. After several sessions of mock flight, he feels she is ready to fly.
"All right, every minute, I want you to radio in to tell me how you're doing."
She agrees, and starts flying. Out of concern for his personal safety (albeit no much), he does not go with her.
After a minute, she radios in, "This is so much fun!" She radios in again, "I think I got the hang of this!"
But she doesn't radio in at the 3 minute mark. Concerned, he tries to contact her himself, but only hears static. As he strains to hear anything, he hears a loud explosion outside. He rushes out, and sees the helicopter in flames. But the blonde climbs out, unhurt.
"Oh my god, are you all right?"
"I'm fine," she replies.
"What happened?"
"Well, I was doing really well, but I was getting cold, so I turned the fan off."

Too Long;Didn't Read: blondes think helicopter blades are giant oscillating fans.